Directions

For frosting, melt butter and chocolate over very low heat; cool to room temperature. Stir cocoa, sour cream, vanilla, and salt into confectioners' sugar, then beat in chocolate (3 cups).

Beat filling ingredients until blended.

To assemble cake:
Slice cake layers in half horizontally. Place one layer on serving plate; spread with half of the peanut filling. Top with second layer; spread with 3/4 cup chocolate frosting. Top with third layer; spread with remaining filling. Top with final layer and frost cake. 4. For decorations, place a star-shaped cookie cutter on cake. Spoon enough nonpareils into center of cookie cutter to make a single layer of sprinkles; gently press into frosting. Remove cutter and outline star with white icing. Makes 16 servings.